Upgrade to Laravel 9 (#4413)

Co-authored-by: DaneEveritt <dane@daneeveritt.com>

app/Exceptions/DisplayException.php

@@ -4,9 +4,12 @@ namespace Pterodactyl\Exceptions;
 
 use Exception;
 use Throwable;
+use Illuminate\Http\Request;
 use Psr\Log\LoggerInterface;
 use Illuminate\Http\Response;
+use Illuminate\Http\JsonResponse;
 use Illuminate\Container\Container;
+use Illuminate\Http\RedirectResponse;
 use Prologue\Alerts\AlertsMessageBag;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
 
@@ -18,44 +21,24 @@ class DisplayException extends PterodactylException implements HttpExceptionInte
     public const LEVEL_ERROR = 'error';
 
     /**
-     * @var string
+     * DisplayException constructor.
      */
-    protected $level;
-
-    /**
-     * Exception constructor.
-     *
-     * @param string $message
-     * @param string $level
-     * @param int $code
-     */
-    public function __construct($message, Throwable $previous = null, $level = self::LEVEL_ERROR, $code = 0)
+    public function __construct(string $message, ?Throwable $previous = null, protected string $level = self::LEVEL_ERROR, int $code = 0)
     {
         parent::__construct($message, $code, $previous);
-
-        $this->level = $level;
     }
 
-    /**
-     * @return string
-     */
-    public function getErrorLevel()
+    public function getErrorLevel(): string
     {
         return $this->level;
     }
 
-    /**
-     * @return int
-     */
-    public function getStatusCode()
+    public function getStatusCode(): int
     {
         return Response::HTTP_BAD_REQUEST;
     }
 
-    /**
-     * @return array
-     */
-    public function getHeaders()
+    public function getHeaders(): array
     {
         return [];
     }
@@ -64,12 +47,8 @@ class DisplayException extends PterodactylException implements HttpExceptionInte
      * Render the exception to the user by adding a flashed message to the session
      * and then redirecting them back to the page that they came from. If the
      * request originated from an API hit, return the error in JSONAPI spec format.
-     *
-     * @param \Illuminate\Http\Request $request
-     *
-     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
      */
-    public function render($request)
+    public function render(Request $request): JsonResponse|RedirectResponse
     {
         if ($request->expectsJson()) {
             return response()->json(Handler::toArray($this), $this->getStatusCode(), $this->getHeaders());
@@ -84,9 +63,7 @@ class DisplayException extends PterodactylException implements HttpExceptionInte
      * Log the exception to the logs using the defined error level only if the previous
      * exception is set.
      *
-     * @return mixed
-     *
-     * @throws \Exception
+     * @throws \Throwable
      */
     public function report()
     {
@@ -96,7 +73,7 @@ class DisplayException extends PterodactylException implements HttpExceptionInte
 
         try {
             $logger = Container::getInstance()->make(LoggerInterface::class);
-        } catch (Exception $ex) {
+        } catch (Exception) {
             throw $this->getPrevious();
         }